Check Six;
I've spent many an hour in European ATC facilities plugged in and learning their ways. I've also spent many hours in the cockpit, so I do have an idea of what goes on over there. The part about being level at 410 isn't the issue as much as getting them there through the other levels when you are busy. There are also the issues of the folks who can't quite make it to 410 but want to get to 370. That is becoming more and more frequented by everything from the heavy jets to the regional jets and the citations. The days of 370 and above being empty are becoming long gone...
regards